Wick burner



y 18, 1933- w. c. LINYDEMANN ET AL 1,918,851

WICK BURNER Filed June 1, 1931 I A. /I. 0 H

INVENTOR N ub. BYZZIAATTQRNEY Patented July 18, 1933 I UNITED- STATESPATENT jomce WALTER o. LINDEMANN AND GUSTAV onions-1N2, or iv nwnuxnn,wiscoivsnv, AS- 7 1 srenous TO A. :r. nnvnnmnnna novnnson coivrrnNY; orMILWAUKEE, WISCON- SIN, A CORPORATION OF WISCONSIN wiox BriannaApplication filed June .1, 1931. Serial No. 541,348.

T he improvements relate to burners in which liquid hydrocarbon fuel isused and is vaporized and burned at the top of a capillarywick, and moreparticularly to means for holding'the wick device in proper positionbetween the wick tubes and permitting it'to be inserted and removedtherefrom, to main tain its position and to work therein withoutdifiiculty, and also for protecting it against the danger of combustionbelow its top and from the clogging and other undesirable effects offalling carbon or otherforeign matter to which it and the fuel in thelower part of the tubes may be exposed.

. and gases to contaminate the atmosphere and l-leretofore it has beenthepractice to some extend to have the outer wick tubeterminate aconsiderable distance below the top of the inner wick tube, and toprovide the outer wick tube with a removable head extending up to thetop of the outer wick tube,so that this head can be removed to giveaccess to the wick, when it'is necessary to remove and replace it. Thishead is sometimes provided with an inwardly extending portion and acollar depending therefrom and extending downwardly alongside the wickto space the wick from the outer wall of the head and secure it inposition. Such heads, however, sometimes give rise to undesirableresults, since they are required'to be very accurately made and fitted,and very carefully posi tioned, and unless so made and positioned willcause bad combustion liberating smoke foul cooking utensils, and mayeven permit the highly inflammable vapor generated at the top of thewick to gravitate down between the tubes and set up dangerous combustionthere; 1

The primary objects 'of the present improvements are to provide a wickspacing and holding device between the wick and the outer tube of simpleand easily manipulated form and efficient and dependable'character,which will permit the outer wicktube to extend substantially to. the topof the inner wick tube, will seal off the space between the outer tubeand the wick and provide an accurate andstable base for the combustiontubes usually employed in connection there,-

and other purposes to pro with, for cooking duce a blue flame.

Other usefulness and advantages will be i understood by those familiarwith the manufacture and use of burners of this character. Theimprovements are illustrated in the accompanying drawing, in which--'Figurel' is a side view, partly in perspec tive, showing the tops ofwick and wick tubes, with the wick holding device in position, embodyingthe improvements, the up per partoof the outer tube being broke'n'awayto expose the wick holder andspacer, which is shown iii-verticalsection;

Figure 2 is aview similar to Fig. 1 of the said wick holder andspacerremoved from the tubes; 7 i v Figure 3 is a half, side elevation andhalf vertical section of the parts shown in Fig. 1, with the combustiontubes and their outer shield inounte'd I thereon, the latter beingbroken off just above their bottoms.

The inner wick tube 1 has an inwardly projecting annular flange 2 at itstop support I ing a cross member 3, whichjmay be employed as a guide.for an ordinary combustion chamber raising and lowering device, and hasan upstanding annular rim 4: formed by folding over the upper edge ofthe tube. The flange 2 is the usual support for the bottom edge of theinner combustion tube S and'the rim 4 the-means for holding it inposition thereon. The collar of the outerwick tube 6 is provided with asimilar flange 7 having a like rim 8 formed inthesame-manner as the rim4,'for supporting the outer combustion tube 9. The combustion tubes 5and 9 may be secured together in the usual manner, and

surrounded by a wind shield 10, preferably secured to the combustionchamber by the same means. The parts so far describedare all of usualand ordinary form,and have been well known and extensively used for manyyears. I J

The flange 7 of the outer wick tube 6 is not formed on that tube, butgisformedon the top of a collar which has its lower portion 11 providedwith curved grooves 12, adapted to engage short beads 13'on theinner'side of the wick tube 6, the grooves 12 having open 2; should beof sufficient length to take care of a is in overlapping relation tosaid edge, whereby a seal between'these parts is provided. It is notnecessary, however, that the beads 13 shall be lodged in the horizontalends12t when the collar is home and the flange 7 in contact with theupper edge of the tube 6, as the friction between the beads and thegrooves will be suliicient to hold them at any ointjin the 'roovea Theroove however slight variations in the location of the beads and groovesand in the length of the outer tube, so that rotation of the collar willalways bring the flange 7 down until it presses against the upper edgeof the tube, and, with the assistance or" the peripheral bead 7 makes agood closure. 7 V

The collar has an inwardly and upwardly extending portion 14 and avertical portion 15, so that it extends, inwardly from theinner surfaceof the outer wick tube and then upwardly to form a space between it andthe in ner wick tube for the wick 16, the wick thus being held inposition and permitted to move up and down between annular guides oflimited depth on one side, sothat it is rather closely confined, nearits upper edge, without much friction. The space, however, is wideenough to permit the perforated wick liner 17 to be moved uptherethrough to the top of the wick tube by the wick raising andlowering device 18. I

The wick, its perforated metal sheath 17 and the wick raising andlowering device 18 are of usual form, andtherefore require nofurtherdescription.

It will be seen from the foregoing that the cutting off of the outerwick tube and the provision of a cap extending above the same, or anyother extension of'the outer tube are avoided by the presentconstruction, and that the upper edge of the. collar carrying the seatfor the outer combustion cylinder is firmly and securely positioned onthe top of the'outer tube, and-a seal formed be tween the flange 7 andand the upper edge of said outer tube. Thebead 7 not only assists informing this seal and in securing the proper relative positions of theparts, but

( provides a slightly extending annulus which may begrasped by thefingers of the user for-the purpose of rotating the collar-and removingand replacing it. This bead may be milled or otherwise provided with, an

' outer edge which will give a good purchase .for the fingers. It willalso be seen that the space between the wick and the outer wlck bustioncylinder or theoutside of the outer wick tuber. The fact that the base.flange 'r' rests squarely on the top of the outer wick tube, and is ineifect integral therewith, ensures a firm and accurately positioned basefor-the combustion chamber on the outside,

and avoids any undesirable results due to the expansion or contractionof the metal or slight inaccuracies which mayoccur. in the manufactureof the parts, which isnotthe case where a head or other extension'of theouter wick tube is used and is mounted on the wick tube by means of aconnection having a limited area. located at a point distant from thepoint at which the combustion tube is supported. Y

The desirability of insulating the wick tube from the combustion in thecombustion chamber and the heat of the combustion chamber cylinders andtheir seats communicated to themtroni the combustion chamber, has beenappreciated for many years, and various devices havev been used toeffect this purpose. It is believed, however, that the presentimprovements have advantages over all others in this-respect; andifdesired, the portionofthe wicktube at 19, opposite the vertical portion150T the collar, may be-provided with perforations to permit thecirculation of'air through the chamber 20 between these parts for thecooling of the parts.

The perforations 21 in the outer fold of the outside combustion tubeholding rim 8 the top of may be employed hether or not the wick tube isperforated, to provide an outlet of air from the chamber 20, and support combustion at'the bottom edge of the outer combustion tube 9. Theseperforations should be of about the same calibre asthose of thecombustion cylinderswhich follow the well known formula for blue flame.combustion-and not more numerous,

so that avery limited supply of air isjgiven. thereby, andat the sametime an upward movement imparted to the air in the chamber 20 to'ventilate itand promote cooling.

By this provision also a small volume of'air may be permitted to enterthe chamber through the joints, ,and any slight amount of oil creepingup through the lower joint; will be takenfcare of by evaporation andventing.

lVhat weiclaim is:

l. The combination-with v outer and inner. concentric wick-tubes havinga space therebetween for a wlckj and acombustlon chamto contact with awick and upwardlytothe' top of said outer'tube and a portion extendingoutwardly therefrom.:-

2. The combination withouter and inner concentric wick tubes having aspace therebetween for a wick. and a, combustion chamber mountedthereon, of a collar supported below the top of and inside the outerwicktube having a portion extending inwardly and upwardly to the top ofsaidouter tube and a portion supported thereby extending outwardly therefromand over the upper edge of the said outer tube. 7

3. The combination with outer and inner concentric wick tubes having aspace therebetween for a wick and a combustion chamber mounted thereon,of a collar supported below the top of and inside the outer wick tubehaving aportion extending inwardly and upwardly to the top of said outertube and a portion extending outwardly therefrom and over the upper edgeof the said outer tube, said last named portion having an edge portionsupported thereby projecting beyond said wick tube and below its upperedge.

4-. The combination with outer and inner concentric wick tubes having aspace therebetween for a wick and a combustion chamber mounted thereon,of a collar supported below the top of and inside the outer wick tubehaving a portion extending inwardly and upwardly to the top of saidouter tube and a portion extendingoutwardly therefrom and over the upperedge of the said outer tube and means for securing the said collar inposition and maintaining said last named portion pressing against theupper edge of said outer wick tube.

5. The combination with outer and inner concentric wick tubes havingtheir upper edges substantially in the same plane and having a spacetherebetween for a wick and a combustion chamber mounted thereon, of

a collar supported below the top of and in-.

side the outer wick tube havinga portion extending inwardly and upwardlyto the top of said outer tube and a portion extending outwardlytherefrom.

6. A burner comprising spaced concentric outer and inner wick-tubesproviding a space between them for a wick and having their upper edgessubstantially in plane, of a collar secured and supported inside theouter wick tube extending to the top thereof and having at its top aseat for a combustion cylinder closing the space between it and theouter wick tube.

7. The combinaton with outer and inner concentric wick tubes having aspace therebetween for a wick and a combustion chamber mounted andsupported thereon, of a collar supported below the top of and inside theouter wi'ck tubehaving a portion extending inwardly and upwardly to thetop of said outer tube and a portion extending rout.-

wardly therefrom there being a space betweenthe inwardly extendedportion of the collar and the upper portion of the outer tube, thelowerportion of the collar being in contact with the inner surface of theouter wick tube, whereby an air chamber closed at top, bottom and innerside is provided beneath-the, combustion chamber.

8. Theacombination with outer and inner concentric wick tubes having aspace therebetween for a wick and a combustion chamber mounted andsupported thereon, of a collar supported below the top of and inside theouter wick tube having a portion extending inwardly and upwardly to thetop of. said outer tube and a portion extending outwardly therefromthere being a space between the inwardly extended portion of the collarand the upper portion of the outer tube, the lower portion of the collarbeing in contact with the inner surface of the outer wick tube Ithroughout its circumference and an extended vertical area, whereby anair chamber closed at to'p,-bottom and inner side'is pros vided beneaththe combustion chamber.

9. The combination with outer and inner concentric wicktubes having aspace therebetween for a wick and a combustion chamber mounted andsupported thereon, of a collar supported below the top of and inside'theouter wick tube having a portion extending inwardly and upwardly to thetop of saidv outer tube and a portion extending outwardly therefrom, anupstanding flange formed in the collar at the junction therewith of the.I

walls and the outer wall being provided 7 with perforations.

10. The combination with outer and inner concentric wick tubes having aspace therebetween for a wick and a combustion chamber mounted andsupported thereon, of a col- ,lar supported below the top of and insidethe outer wick tube having a portion extending inwardly and upwardly tothe top of said I outer tube and a portion extending outward- I lytherefrom, an upstanding flange formed in the collar at the junctiontherewith of the outwardly extending portion to position the lower edgeof a combustion chamber outer cylinder on said outwardly extendingportion, said flange having two spaced upright walls and the outer wallbeing provided with perforations, and there being a space between theinwardly and upwardly extending portion of the collar and the said outerwick tube with which said perforations communicate.

11. The combination with outer and inner concentric wick tubes having aspace therebetween for awick and a combustion chamber' mounted thereon,of a collar having a substantial portion mounted below the top of andinside the outer wick tube, means. for

ber mounted thereon, of a collar, a substantial portion "of said collarmounted below the top of and inside the outer wick tube,

said. portion extending inwardly and up wardly to the top of said outertube, a portionextending outwardly therefrom, an upstanding flangeformed in the collar at the junction therewith of the outwardlyextending portion to position the lower edge of a combustion chamberouter cylinder on said last nanied'portion, said flange having twospaced upright walls and the outer wall being provided'withperforations, means for supporting said collar positioned substantial-1y below the top of and on the inside of the outer wick tu WALTER 'o.LINDEMANN.

GUSTAV o. LORENZ;

